Nesh: Your question brings back a memory I'll NEVER forgot, when one of my music teachers, renowned vocal coach ( Judy Davis ) reminded us (her students) that she only accepted new students (under 25) because they haven't yet developed too many bad habits to unlearn, while older students have probably already developed too many engrained bad habits too dificult to break.

That said, I believe even an older student has the potential if able to dedicate the time & work (though more difficult) to improve their playing & musicianship. You first need to set your playing goals (both near & long term). I strongly suggest, if at all possible, finding a GOOD keyboard instructor in your area to work with. The advantage of this is that they'll be able to watch & hear you play and observe things about your playing, of which you may not be able to see (or hear) yourself. From this they can guide your path to keyboard improvment. It's one thing to appreciate and hear counter melodies, bass lines on a CD, etc, but it's quite another to get your fingers to duplicate & play what you hear, including coordinating both Left & RT hands to concurrently do different things. Mastering basic keyboard playing skills (scales, chords, progressions) will help to this end, whether playing (reading) from music, or by ear. I think mastering both these skills is equally important. I also suggest recording yourself and listening and critiquing your playing as objectively as possible. Good luck. - Scott